Fixing WebRTC after moving from src/webrtc to src/

In https://webrtc-review.googlesource.com/c/src/+/1560 we moved WebRTC
from src/webrtc to src/ (in order to preserve an healthy git history).
This CL takes care of fixing header guards, #include paths, etc...

NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
TBR=tommi@webrtc.org


Bug: chromium:611808
Change-Id: Iea91618212bee0af16aa3f05071eab8f93706578
Reviewed-on: https://webrtc-review.googlesource.com/1561
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#19846}
diff --git a/pc/peerconnection.cc b/pc/peerconnection.cc
index 64b842b..91d0c90 100644
--- a/pc/peerconnection.cc
+++ b/pc/peerconnection.cc
@@ -8,39 +8,39 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "webrtc/pc/peerconnection.h"
+#include "pc/peerconnection.h"
 
 #include <algorithm>
 #include <utility>
 #include <vector>
 
-#include "webrtc/api/jsepicecandidate.h"
-#include "webrtc/api/jsepsessiondescription.h"
-#include "webrtc/api/mediaconstraintsinterface.h"
-#include "webrtc/api/mediastreamproxy.h"
-#include "webrtc/api/mediastreamtrackproxy.h"
-#include "webrtc/call/call.h"
-#include "webrtc/logging/rtc_event_log/rtc_event_log.h"
-#include "webrtc/media/sctp/sctptransport.h"
-#include "webrtc/pc/audiotrack.h"
-#include "webrtc/pc/channelmanager.h"
-#include "webrtc/pc/dtmfsender.h"
-#include "webrtc/pc/mediastream.h"
-#include "webrtc/pc/mediastreamobserver.h"
-#include "webrtc/pc/remoteaudiosource.h"
-#include "webrtc/pc/rtpreceiver.h"
-#include "webrtc/pc/rtpsender.h"
-#include "webrtc/pc/streamcollection.h"
-#include "webrtc/pc/videocapturertracksource.h"
-#include "webrtc/pc/videotrack.h"
-#include "webrtc/rtc_base/bind.h"
-#include "webrtc/rtc_base/checks.h"
-#include "webrtc/rtc_base/logging.h"
-#include "webrtc/rtc_base/stringencode.h"
-#include "webrtc/rtc_base/stringutils.h"
-#include "webrtc/rtc_base/trace_event.h"
-#include "webrtc/system_wrappers/include/clock.h"
-#include "webrtc/system_wrappers/include/field_trial.h"
+#include "api/jsepicecandidate.h"
+#include "api/jsepsessiondescription.h"
+#include "api/mediaconstraintsinterface.h"
+#include "api/mediastreamproxy.h"
+#include "api/mediastreamtrackproxy.h"
+#include "call/call.h"
+#include "logging/rtc_event_log/rtc_event_log.h"
+#include "media/sctp/sctptransport.h"
+#include "pc/audiotrack.h"
+#include "pc/channelmanager.h"
+#include "pc/dtmfsender.h"
+#include "pc/mediastream.h"
+#include "pc/mediastreamobserver.h"
+#include "pc/remoteaudiosource.h"
+#include "pc/rtpreceiver.h"
+#include "pc/rtpsender.h"
+#include "pc/streamcollection.h"
+#include "pc/videocapturertracksource.h"
+#include "pc/videotrack.h"
+#include "rtc_base/bind.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/logging.h"
+#include "rtc_base/stringencode.h"
+#include "rtc_base/stringutils.h"
+#include "rtc_base/trace_event.h"
+#include "system_wrappers/include/clock.h"
+#include "system_wrappers/include/field_trial.h"
 
 namespace {